Dream of Mirror Ruins

Upgrading from RHEL 7.9 to RHEL 8.10 Planning an upgrade Verify that the current OS and kernel version. ~]# cat /etc/redhat-releaseRed Hat Enterprise Linux Server release 7.9 (Maipo)~]# uname -r3.10.0-1160.el7.x86_64 To determine whether the upgrade will be inhibited due to NIC naming. ~]# [ $(ip link | egrep '^[0-9]+: eth[0-9]+:' | wc -l) -ge 1 ] && [ $(readlink /sys/class/net/* | grep -v '/virtual/' | wc -l) -ge 2 ] && echo 'In-place upgrade will be inhibited!' Downlo...

Upgrading from RHEL 7.8 to RHEL 7.9 Pacemaker Corosync Cluster Oracle Database 11g Planning an upgrade ~]# cat /etc/redhat-releaseRed Hat Enterprise Linux Server release 7.8 (Maipo)~]# uname -aLinux pacemaker01 3.10.0-1127.el7.x86_64 #1 SMP Tue Feb 18 16:39:12 EST 2020 x86_64 x86_64 x86_64 GNU/Linux~]# pcs statusCluster name: clusterStack: corosyncCurrent DC: pacemaker01-hb (version 1.1.21-4.el7-f14e36fd43) - partition with quorumLast updated: Thu Apr 2 22:06:55 2026Last change: Thu Apr ...

High CPU Usage on RedHat 7.8 Symptoms ksoftirqd/0 High CPU. Tasks: 254 total, 2 running, 252 sleeping, 0 stopped, 0 zombie%Cpu(s): 0.4 us, 6.2 sy, 0.0 ni, 0.8 id, 57.3 wa, 0.0 hi, 35.2 si, 0.0 stKiB Mem : 995712 total, 73416 free, 804532 used, 117764 buff/cacheKiB Swap: 2097148 total, 1847020 free, 250128 used. 25080 avail Mem PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 6 root 20 0 0 0 0 R 94.7 0.0 11:...

The Disk is RAW and Cannot be Formatted on WSFC Windows Server WSFS Symptoms 非正常删除 windows2012 R2 故障转移集群后，重新安装系统后，发现磁盘变成 RAW 并且联机后格式化无法顺利完成。 Cause 由于是非正常删除集群，导致这些磁盘依然被上一个集群的 PR Key（SCSI-3 Reservation）锁定着，导致这些磁盘被占用而不能访问和格式化。 Solution 对其中一台节点的异常磁盘分别执行如下清理保留磁盘命令。 Clear-ClusterDiskReservation -Disk <disk_number> SCSI 锁是多台主机用来操作 LUN 的基本机制。在 Windows 存储环境中，当多台 Windows 主机需要访问一个 LUN 的情况下，例如 Windows Cluster 环境，就会用到 SCSI 锁。

Windows Server MPIO Install. Install-WindowsFeature -Name Multipath-IO Configure. PS C:\> Set-MSDSMGlobalLoadBalancePolicy -Policy RRPS C:\> Get-MSDSMGlobalDefaultLoadBalancePolicyRRmpclaim -empclaim -v -dmpclaim -s -d Show the LUN wwn/uid. mpclaim -s -d <disk> Reference ・ Multipath I/O (MPIO) troubleshooting guidance

Lenovo System x3850 X6 Service Manual Hardware Replacement ・ Removing the standard I/O book | ASU Save config. asu64 show --host 192.168.70.125 --user USERID --password PASSW0RDasu64 save <system_config>asu64 show SYSTEM_PROD_DATA > <system_vpd>asu64 fodcfg reportkeyasu64 fodcfg exportkeyasu64 show VPD > <component_vpd> Restore config. asu64 restore <system_config>asu64 fodcfg installkeyasu64 set SYSTEM_PROD_DATA.SysInfoProdName <machine_type_model>asu...

Install OpenClaw on Windows 11 WSL2 openclaw statusopenclaw healthopenclaw gateway status AI Model openclaw plugins enable qwen-portal-authopenclaw gateway restartopenclaw models auth login --provider qwen-portal --set-defaultopenclaw models set qwen-portal/coder-modelopenclaw models status

Installing NetBox on Rocky Linux 9.7 NetBox: v4.5.4 Operation System: Rocky Linux 9.7 System Settings ~]$ sudo dnf check-update~]$ sudo dnf -y upgrade~]$ sudo setenforce 0~]$ sudo sed -i 's/^SELINUX=.*/SELINUX=disabled/' /etc/selinux/config Installing PostgreSQL 18 # Install the repository RPM:~]$ sudo dnf install -y https://download.postgresql.org/pub/repos/yum/reporpms/EL-9-x86_64/pgdg-redhat-repo-latest.noarch.rpm# Install PostgreSQL:~]$ sudo dnf install -y postgresql18-server# Option...

Zabbix Log file monitoring Item configuration Type: Zabbix agent (active) Key: logrt["/tmp/bcv.*.log","^Finished",,,skip] Type of information: Log Trigger configuration Expression: nodata(/fedora/logrt["/tmp/bcv.*.log","^Finished",,,skip],90000)=1 Reference ・ https://www.zabbix.com/documentation/current/en/manual/config/items/itemtypes/log_items

Installing pre-compiled Zabbix agent binaries Download zabbix agent tar package. ~]$ wget https://cdn.zabbix.com/zabbix/binaries/stable/7.0/7.0.23/zabbix_agent-7.0.23-linux-3.0-amd64-static.tar.gz Create zabbix user. ~]$ sudo groupadd zabbix -g 201~]$ sudo useradd -M -r -g zabbix -u 201 -s /bin/false zabbix Copy binary files. ~]$ tar xf zabbix_agent-7.0.23-linux-3.0-amd64-static.tar.gz~]$ sudo cp sbin/zabbix_agentd /usr/sbin/~]$ sudo cp bin/* /usr/sbin/ Create the agent configuration ...